track monitor-group (interface view)

Function

The track monitor-group command configures an interface to track an interface monitoring group. This interface is called a track interface.

The undo track monitor-group command disables an interface from tracking an interface monitoring group.

By default, no interface is configured to track an interface monitoring group.

Format

track monitor-group monitor-group-name [ trigger-down-weight trigger-down-weight-value ]

undo track monitor-group

Parameters

Parameter	Description	Value
monitor-group-name	Specifies the name of a route monitoring group.	The value is a string of 1 to 31 case-sensitive characters, spaces not supported. The character string can contain spaces if it is enclosed in double quotation marks (").
trigger-down-weight trigger-down-weight-value	Specifies the maximum down weight value of a track interface.	The value is an integer ranging from 1 to 1000. By default, a track interface goes down only when all binding interfaces in the interface monitoring group go down.

Parameter

Description

Value

monitor-group-name

Specifies the name of a route monitoring group.

The value is a string of 1 to 31 case-sensitive characters, spaces not supported.

The character string can contain spaces if it is enclosed in double quotation marks (").

trigger-down-weight trigger-down-weight-value

Specifies the maximum down weight value of a track interface.

The value is an integer ranging from 1 to 1000. By default, a track interface goes down only when all binding interfaces in the interface monitoring group go down.

Views

100GE-Trunk member Layer 2 interface view, 100GE-Trunk member interface view, Layer 2 100GE interface view, 100ge sub-interface view, 100GE interface view, Layer 2 10GE interface view, 10GE sub-interface view, 10GE interface view, 200GE sub-interface view, 25GE-L2 view, 25GE sub-interface view, 25GE interface view, 400GE-L2 view, 400GE sub-interface view, 400GE interface view, 40GE-Trunk member Layer 2 interface view, 40GE-Trunk member interface view, Layer 2 40GE interface view, 40GE sub-interface view, 40GE interface view, Layer 2 50GE interface view, 50GE sub-interface view, 50GE interface view, Eth-Trunk sub-interface view, Eth-Trunk interface view, FlexE sub-interface view, FlexE interface view, Layer 2 GE interface view, GE optical interface view, GE sub-interface view, GE interface view, GE electrical interface view, Global VE interface view, Loopback interface view, PW-VE interface view, VE interface view, Management interface view

Default Level

2: Configuration level

Task Name and Operations

Task Name	Operations
interface-mgr	write

Usage Guidelines

Usage Scenario

A user-side interface that tracks an interface monitoring group is called a track interface. To configure a user-side interface to track the status of an interface monitoring group, run the track monitor-group command on the interface.

If the down weight sum of all the binding interfaces in the monitoring group is greater than or equal to the value specified using trigger-down-weight-value on the track interface, the track interface goes down, and service traffic is switched to the backup link. Otherwise, the track interface goes up, and service traffic is switched back to the primary link.

Prerequisites

An interface monitoring group has been created using the monitor-group command.

Configuration Impact

After the track monitor-group command is run, the track interface changes its status based on the binding interface status.

Follow-up Procedure

Run the monitor enable command to associate the interface monitoring group with the track interface.

Precautions

A maximum of 256 interfaces can be configured to track an interface monitoring group.
A Trunk interface and its member interfaces cannot be associated with monitor group at the same time.
Setting the value of trigger-down-weight-value on a track interface to be less than or equal to the down weight sum of all binding interfaces is recommended. If the value is greater than the down weight sum, packet loss occurs. For example, an interface monitoring group named group1 has two binding interfaces, GE 0/1/0 and GE 0/1/8, with the down weights 10 and 20 respectively. The value of trigger-down-weight-value on the track interface is 40, which is greater than the down weight sum 30 of GE 0/1/0 and GE 0/1/8. As a result, the track interface will never go down, and traffic cannot be switched to the backup link, causing packet loss.

Example

# Configure GE 0/1/8 to track the interface monitoring group named group1 and set the down weight threshold of GE 0/1/8 to 100.

<HUAWEI> system-view
[~HUAWEI] monitor-group group1
[*HUAWEI-monitor-group-group1] binding interface GigabitEthernet 0/1/0 down-weight 20
[*HUAWEI-monitor-group-group1] binding interface GigabitEthernet 0/1/1 down-weight 40
[*HUAWEI-monitor-group-group1] binding interface GigabitEthernet 0/1/2 down-weight 60
[*HUAWEI-monitor-group-group1] quit
[*HUAWEI] interface GigabitEthernet 0/1/8
[*HUAWEI-GigabitEthernet0/1/8] track monitor-group group1 trigger-down-weight 100
[*HUAWEI-GigabitEthernet0/1/8] quit
[*HUAWEI] monitor-group group1
[*HUAWEI-monitor-group-group1] monitor enable